In which of the following processes, fused sodium hydroxide is electrolysed at 330° C temperature for extraction of sodium 

  1. A

    Castner's process

  2. B

    Down's process

  3. C

    Cyanide process

  4. D

    Both (b) and (c) 

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    Solution:

    Castners process used to obtain Na , by electrolysis of sodium hydroxide.

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